TL* THE CONTACT OWNS A 2012 HYUNDAI SONATA. THE CONTACT STATED THAT WHEN DEPRESSING THE ACCELERATOR PEDAL, HIS FOOT WOULD SWELL, CAUSING HIM TO PAY LESS ATTENTION TO THE ROAD. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THEY ADVISED HIM THAT THEY WERE UNABLE TO DIAGNOSE THE FAILURE. THE MANUFACTURER WAS CONTACTED AND THEY OFFERED NO ASSISTANCE. THE CONTACT ONLY EXPERIENCED THIS PROBLEM WHILE DRIVING HIS VEHICLE. THE FAILURE MILEAGE WAS APPROXIMATELY 30. THE VIN WAS UNAVAILABLE.